<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/html">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
<div id="app"></div>
<script src="../js/vue.js"></script>
<script>
  const app = new Vue({
    el:'#app',
    data:{
      msg: 'Vue.js'
    }
  })
</script>
</body>
</html>